Taurine cleaning composition with self-thickening under acidic conditions and its application

Abstract

The present invention discloses a taurine cleaning composition and its application under acidic conditions, and relates to the technical field of cleaning compositions. The present invention uses a small amount of alkanoyl taurate or / and methyl alkanoyl taurate, and a certain proportion of fatty acids are used in combination, and polyols are added. In a water-based environment, a structured layered structure can be formed to achieve a self-thickening effect under slant acidic conditions, and a higher viscosity can be achieved at high and normal temperatures, with excellent viscosity stability, without the need to add additional structuring agents such as thickeners or using a large amount of surfactants, the stability requirements at room temperature to high temperatures can be achieved. The taurine cleaning composition has a viscosity of ≥1000mPa.s at 25°C at 0.6s-1, and a ratio of the viscosity at 50°C to the viscosity at 25°C of ≥0.3, and is stable at least 2 weeks at 25°C and 50°C, and no visually observable separation occurs.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning compositions, and in particular relates to a taurine cleaning composition that self-thickens under acidic conditions and an application thereof. Background Art

[0002] Existing scientific knowledge shows that the natural pH of the skin is significantly lower than 7, which is around 4.7. Acidic (pH range 3-5) cleansers do not interfere with the natural pH of the skin and can achieve the following benefits: 1) reduce the amount of preservatives required in the product by improving the effect of preservatives; 2) stabilize and improve the effectiveness of multiple active ingredients; 3) help repair and maintain skin barrier tissue; 4) support the natural skin flora to eliminate excessive accumulation of harmful microorganisms. In hair cleansing products, mild, acidic cleansers can effectively reduce the swelling of hair fibers and improve hair gloss.

[0003] However, conventional cosmetic compositions are usually formulated to have a neutral to slightly alkaline pH (e.g., pH 6.0 to 8.0) because most surfactant combinations can form larger micelles under neutral to slightly alkaline conditions, thereby achieving the purpose of increasing viscosity; while it is difficult to form larger or even lamellar micelles under acidic conditions, so it is difficult to form satisfactory viscosity / rheological properties. Too low viscosity will make it difficult for the cleanser to stay on the hair or skin during and / or after use, and it is easy to drip and flow into the user's eyes, mouth, ears or nasal passages, resulting in an unpleasant consumer experience.

[0004] Daily personal care cleaning products often need to have a certain high viscosity (usually > 1000mPa.s), because only when the viscosity reaches a certain level will it not be too easy to flow and inconvenient to use. At the same time, higher viscosity will also make the product reflect texture and beauty, so that consumers will have a higher evaluation of product quality and concentration. In addition, high viscosity can make the product stable due to greater steric hindrance, without stratification, and has better stability.

[0005] Amino acid surfactants are surfactants based on biological substances, with excellent surface activity, low irritation, easy degradation, good antibacterial properties, etc., which meet people's expectations for green, safe and pollution-free personal cleaning products. However, amino acid surfactants usually face the problem of difficult thickening, and often need to add structuring agents or cooperate with a large number of other surfactants to achieve a certain viscosity standard.

[0006] Another problem with compositions using amino acid surfactants as the main surfactant is the high temperature stability problem. Usually, if the composition is an isotropic solution (transparent solution), there is no stability problem regardless of whether the viscosity is high or low. But in most cases, we need to add various insoluble beneficial agents, such as grease, silicone oil, anti-dandruff agent, scrub, etc. If the viscosity of the composition is too low, it will easily lead to instability problems. These water-insoluble substances will have stratification and precipitation problems. Therefore, maintaining a sufficiently high viscosity at room temperature and high temperature (usually 50°C) is a favorable means to ensure product stability.

[0007] The applicant's prior patent CN116098821A describes that by controlling the mass ratio of alkanoyl taurate and methyl alkanoyl taurate, the shortcomings of the two raw materials are overcome, and their respective advantages and characteristics are brought into play, so that the obtained cleaning products are easier to thicken, have high transparency and good stability. However, in order to achieve the ideal viscosity, it is necessary to add an additional thickener (for example, PEG-150 stearate is used in the embodiment). Although the thickening (viscosity) problem at room temperature is solved, there is still a problem that the viscosity decreases rapidly as the temperature rises, and the high temperature stability of the product is poor. The patent does not further study the stability (viscosity) of high temperature, and it does not realize application under acidic conditions.

[0008] Based on this, the present invention optimizes the composition of the cleaning composition, uses a taurine surfactant and a fatty acid, and adds a polyol to induce the formation of a lamellar phase, thereby achieving a self-thickening effect under slightly acidic conditions. The resulting composition can not only obtain an ideal viscosity at room temperature, but also has an ideal viscosity at a higher temperature. Summary of the invention

[0009] The present invention aims at the problems existing in the prior art and provides a taurine cleaning composition that self-thickens under acidic conditions and its application. The present invention uses a small amount of alkanoyl taurate or / and methyl alkanoyl taurate, and a certain proportion of fatty acids, and adds polyols, which can form a structured layered structure in a water-based environment, achieve self-thickening under slightly acidic conditions, achieve a high viscosity at both high and normal temperatures, have excellent viscosity stability, and can achieve stability requirements from normal to high temperatures without the need to add additional structuring agents such as thickeners or use a large amount of surfactants.

[0010] To achieve the above objectives, in a first aspect, the present invention provides a taurine cleaning composition that self-thickens under acidic conditions. The taurine cleaning composition that self-thickens under acidic conditions is characterized in that it comprises the following raw materials:

[0011] A) a taurate surfactant; the taurate surfactant is selected from alkanoyl taurate and / or methyl alkanoyl taurate;

[0012] The alkanoyl taurate includes at least one of sodium lauroyl taurate, sodium myristoyl taurate, and sodium cocoyl taurate; the methyl alkanoyl taurate includes at least one of sodium methyl lauroyl taurate, sodium methyl myristoyl taurate, and sodium methyl cocoyl taurate;

[0013] B) fatty acid; the fatty acid is a saturated or unsaturated fatty acid of C8-C20;

[0014] C) polyols;

[0015] D) Acid-base regulator;

[0016] E) Water.

[0017] In a preferred embodiment, the polyol is selected from at least one of glycerol, propylene glycol, polyethylene glycol, sorbitol, glucose, sucrose, and trehalose; the acid-base regulator includes at least one of citric acid, lactic acid, salicylic acid, glycolic acid, fruit acid, hydrochloric acid, and phosphoric acid; and the pH of the taurine cleaning composition is 2.5-5.9.

[0018] In a preferred embodiment, the polyol is sorbitol, glycerol or glucose; the acid-base regulator is citric acid or salicylic acid; and the pH of the taurine cleaning composition is 3.5-5.5.

[0019] In a preferred embodiment, the total amount of the taurate surfactant is 1-15% by weight; the amount of the fatty acid is 0.5-20% by weight; the amount of the polyol is 1-40% by weight; and the amount of the acid-base regulator is 0.01-5% by weight.

[0020] In a preferred embodiment, the total amount of the taurate surfactant is 3-15% by weight; the amount of the fatty acid is 0.5-15% by weight; and the amount of the polyol is 3-30% by weight.

[0021] In a preferred embodiment, the fatty acid includes at least one of oleic acid, coconut acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid.

[0022] In a preferred embodiment, the viscosity of the taurine cleaning composition at 0.6 s-1 at 25°C is ≥ 1000 mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥ 0.3.

[0023] In a preferred embodiment, the cleaning composition is stable at 25°C and 50°C for at least 2 weeks without visually observable separation.

[0024] In a preferred embodiment, the taurine cleaning composition further comprises a surfactant B other than the taurate surfactant A, and the amount of the surfactant B is 0-15 wt %; the surfactant B is selected from one or more of anionic surfactants, cationic surfactants, nonionic surfactants and amphoteric surfactants, preferably amphoteric surfactants; more preferably, the amphoteric surfactant comprises at least one of a betaine amphoteric surfactant, a hydroxysulfobetaine amphoteric surfactant and a sodium acetate amphoteric surfactant.

[0025] In a second aspect, the present invention provides use of the above-mentioned taurine cleaning composition which self-thickens under acidic conditions in the preparation of a personal care detergent.

[0026] In a preferred embodiment, the personal care detergent further comprises an exfoliant and / or an anti-dandruff agent, wherein the amount of the exfoliant is 1 to 45% by weight, preferably 1 to 10% by weight; the amount of the anti-dandruff agent is 0.1-5% by weight.

[0027] In a preferred embodiment, the personal care detergent also includes a hydrophobic skin or hair benefit agent in an amount of 0 to 30% by weight, preferably 0.1 to 10% by weight, and more preferably 0.1 to 5% by weight; the hydrophobic skin or hair benefit agent includes at least one of silicone oil, grease, wax, hydrophobic plant extract, hydrocarbon, higher alcohol, ester, and essential oil.

[0028] In a preferred embodiment, the personal care detergent also includes a water-soluble skin or hair benefit agent in an amount of 0 to 50% by weight, preferably 3 to 30% by weight; the water-soluble skin or hair benefit agent includes at least one of allantoin, urea, pyrrolidone carboxylic acid, pyrrolidone carboxylate, hyaluronic acid, hyaluronic acid salt, sorbic acid, sorbate, and amino acid.

[0029] In a preferred embodiment, the personal care detergent further includes additives, and the additives are selected from one or more of preservatives, chelating agents, antimicrobial agents, fillers, penetrants, sunscreens, fragrances, dispersants, and film-forming agents; the additives are all conventional components in the art and are not limited here.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present invention uses a small amount of alkanoyl taurate and / or methyl alkanoyl taurate, and a certain proportion of fatty acids, which can form a structured layered structure under neutral to acidic conditions in a water-based environment, can achieve a high viscosity at both high and normal temperatures, and has excellent viscosity stability. It does not require the addition of additional structuring agents such as thickeners or the use of a large amount of surfactants to achieve stability requirements at room temperature to high temperatures.

[0032] 2. The taurine cleaning composition of the present invention which self-thickens under acidic conditions has a viscosity of ≥1000 mPa.s at 25°C at 0.6s-1, and a ratio of the viscosity at 50°C to the viscosity at 25°C of ≥0.3. It is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good viscosity stability.

[0033] 3. The taurine cleaning composition that self-thickens under acidic conditions of the present invention does not need to use a large amount of surfactant, which can effectively save costs and avoid the reduction of performance caused by a large amount of surfactant.

[0034] 4. The present invention uses alkanoyl taurate and / or methyl alkanoyl taurate in combination with a certain proportion of fatty acids and adds polyols, which can not only achieve the viscosity stability requirements of ordinary cleaning products without adding high-density solid components, but also meet the stability requirements of cleaning products added with a large amount of high-density solid components. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with examples, but these examples do not constitute any limitation to the present invention.

[0036] Surfactant B

[0037] In a preferred embodiment, the taurine cleaning composition further comprises a surfactant B other than the taurate surfactant A, and the amount of the surfactant B is 0-15 wt %; the surfactant B is selected from one or more of anionic surfactants, cationic surfactants, nonionic surfactants and zwitterionic surfactants.

[0038] Anionic surfactants can be any anionic surfactants known or previously used in the field of aqueous surfactant compositions. Suitable anionic surfactants include, but are not limited to, alkyl sulfates, alkyl ether sulfates, alkyl sulfonates, alkyl aryl sulfonates, α-olefin sulfonates, alkylamide sulfonates, alkyl aryl polyether sulfates, alkyl amido ether sulfates, alkyl monoglyceryl ether sulfates, alkyl monoglyceride sulfates, alkyl monoglyceride sulfonates, alkyl succinates, alkyl sulfosuccinates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkyl amido sulfosuccinates, alkyl thioacetates, alkyl phosphates, alkyl ether phosphates, alkyl ether carboxylates, alkyl amido ether carboxylates, N-alkyl amino acids, N-acyl amino acids, alkyl peptides, alkyl hydroxypropyl sulfonates, alkyl isethionates, carboxylates. The cations of the salts in the aforementioned anionic surfactants are selected from the salts of sodium, potassium, magnesium, ammonium, ethanolamine, diethanolamine, triethanolamine, isopropylamine, diisopropylamine and triisopropylamine. The alkyl and acyl groups of the aforementioned surfactants contain 6-24 carbon atoms, preferably 8-22 carbon atoms, more preferably 12-18 carbon atoms, and may be unsaturated; the aryl group in the surfactant is selected from phenyl or benzyl. The ether-containing surfactant contains 1-10 ethylene oxide and / or propylene oxide, more preferably 1-3 ethylene oxide.

[0039] Examples of suitable anionic surfactants include: lauryl alcohol polyethoxylate sulfate, tridecyl alcohol polyeth sulfate, myristyl alcohol polyeth sulfate, C 12 -C 13 Palm alcohol polyether sulfate, C 12 -C 14 Palm alcohol polyether sulfate, and C 12 -C 15 Sodium, potassium, lithium, magnesium, and ammonium salts of palmityl polyether sulfate, the above anionic surfactants can be modified by 1-3 moles of ethylene oxide to achieve ethoxylation; and sodium, potassium, lithium, magnesium, ammonium and triethanolamine salts of lauryl sulfate, coconut sulfate, tridecyl sulfate, myristyl sulfate, cetyl sulfate, cetearyl sulfate, stearyl sulfate, oleyl sulfate, tallow sulfate; and disodium lauryl sulfosuccinate, disodium lauryl polyethoxy ether sulfosuccinate, sodium cocoyl isethionate, C 12 -C 14 Sodium olefin sulfonate, sodium laureth-6 carboxylate, sodium cocoyl glycerate, sodium myristyl sarcosine, sodium dodecylbenzene sulfonate, sodium cocoyl sarcosinate, sodium cocoyl glutamate, potassium myristoyl glutamate, triethanolamine monolauryl phosphate and fatty acid soap, wherein the fatty acid soap is a sodium, potassium, ammonium or triethanolamine salt of a saturated or unsaturated fatty acid having 8 to 22 carbon atoms.

[0040] The cationic surfactant can be any cationic surfactant known or previously used in the field of aqueous surfactant compositions. Suitable classes of cationic surfactants include, but are not limited to, polyquaternium salts, alkylamines, alkylimidazolines. In addition, alkylamine oxides can function as cationic surfactants at low pH.

[0041] Exemplary polyquaternium salts include at least one of polyquaternium-10, polyquaternium-7, polyquaternium-6, and polyquaternium-67.

[0042] The alkylamine surfactants can be primary, secondary and tertiary substituted or unsubstituted fatty C 12 -C 22 Salts of alkylamines, and materials sometimes referred to as "amidoamines." Non-limiting examples of alkylamines and their salts include dimethyl cocoamine, dimethyl palmitylamine, dioctylamine, dimethyl stearylamine, dimethyl soyamine, soyamine, myristylamine, tridecylamine, ethyl stearylamine, N-tallowpropanediamine, ethoxylated stearylamine, dihydroxyethyl stearylamine, arachidylbehenamine, dimethyl laurylamine, stearylamine hydrochloride, soyamine chloride, stearylamine formate, N-tallowpropanediamine dichloride, and aminodimethicone (the INCI name for silicone polymers terminated with amino functional groups, such as aminoethylaminopropylsiloxane).

[0043] Non-limiting examples of amidoamines and their salts include stearamidopropyl dimethylamine, stearamidopropyl dimethylamine citrate, palmitamidopropyl diethylamine, and cocoamidopropyl dimethylamine lactate.

[0044] Non-limiting examples of alkyl imidazoline surfactants include alkyl hydroxyethyl imidazolines, such as stearyl hydroxyethyl imidazoline, coconut oil hydroxyethyl imidazoline, ethyl hydroxymethyl oleyl imidazoline, and the like.

[0045] Non-limiting examples of ethoxylated amines include PEG-cocopolyamine, PEG-15 tallowamine, quaternium-52, and the like.

[0046] Among the quaternary ammonium compounds that can be used as cationic surfactants, some correspond to the general formula: (R 5 R 6 R 7 R 8 N + )E - , where R 5 , R 6 , R 7 , and R 8 E is independently selected from aliphatic groups having 1 to 22 carbon atoms, aromatic groups, alkoxy groups, polyoxyalkylene groups, alkylamido groups, hydroxyalkyl groups, aryl groups or alkylaryl groups; -It is a salt that forms an anion, selected from halogen (e.g. chloride, bromide), acetate, citrate, lactate, glycerate, phosphate, nitrate, sulfate or alkyl sulfate. Aliphatic groups may contain ether bonds, ester bonds, amino groups, etc. in addition to carbon and hydrogen atoms. Long-chain aliphatic groups, especially aliphatic groups with more than 12 carbon atoms, may be saturated or unsaturated. Aryl groups are selected from phenyl and benzyl.

[0047] Exemplary quaternary ammonium surfactants include, but are not limited to, cetyltrimethylammonium chloride, cetylpyridinium chloride, dicetyldimethylammonium chloride, dihexadecyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, dioctadecyldimethylammonium chloride, diicosyldimethylammonium chloride, dibehenyldimethylammonium chloride, dihexadecyldimethylammonium chloride, dihexadecyldimethylammonium acetate, behentrimethylammonium chloride, benzalkonium chloride, benzethonium chloride, di(coconut alkyl)dimethylammonium chloride, ditallowdimethylammonium chloride, di(hydrogenated tallow)dimethylammonium chloride, di(hydrogenated tallow)dimethylammonium acetate, ditallowdimethylammonium methylsulfate, ditallowdipropylammonium phosphate, and ditallowdimethylammonium nitrate.

[0048] At low pH, alkylamine oxides can be protonated and have properties similar to N-alkylamines. Examples include, but are not limited to, dimethyl-dodecylamine oxide, oleyl di(2-hydroxyethyl)amine oxide, dimethyltetradecylamine oxide, di(2-hydroxyethyl)-tetradecylamine oxide, dimethylhexadecylamine oxide, behenamine oxide, coconut amine oxide, decyltetradecylamine oxide, dihydroxyethyl C12-15 alkoxypropylamine oxide, dihydroxyethyl coconut amine oxide, dihydroxyethyl laurylamine oxide, dihydroxyethyl stearylamine oxide, dihydroxyethyl tallowamine oxide, hydrogenated palm kernel amine oxide, hydrogenated tallowamine oxide, hydroxyethyl hydroxypropyl C 12 -C 15 Alkoxypropylamine oxide, lauramine oxide, myristylamine oxide, cetylamine oxide, oleamidopropylamine oxide, oleylamine oxide, palmitylamine oxide, PEG-3 lauramine oxide, dimethyl lauramine oxide, potassium triphosphorylmethylamine oxide, soyaamidopropylamine oxide, cocoamidopropylamine oxide, stearylamine oxide, tallowamine oxide and mixtures thereof.

[0049] Amphoteric or zwitterionic surfactants are molecules containing acidic and basic moieties and having the ability to act as either an acid or a base. Suitable surfactants may be any amphoteric surfactant known or previously used in the field of aqueous surfactant compositions. Exemplary amphoteric surfactant classes include, but are not limited to, amino acids (e.g., N-alkyl amino acids and N-acyl amino acids), betaines, sulfobetaines, and alkyl amphocarboxylates.

[0050] Amino acid-based surfactants suitable for use in the present invention include surfactants represented by formula (3):

[0051]

[0052] Among them, R 10 is selected from a saturated or unsaturated hydrocarbon group having 10 to 22 carbon atoms or an acyl group containing a saturated or unsaturated hydrocarbon group having 9 to 22 carbon atoms, Y is hydrogen or methyl, and Z is selected from hydrogen, -CH3, -CH(CH3)2, -CH2CH(CH3)2, -CH(CH3)CH2CH3, -CH2C6H5, -CH2C6H4OH, -CH2OH, -CH(OH)CH3, -(CH2)4NH2, -(CH2)3NHC(NH)NH2, -CH2C(O)O - M + 、-(CH2)2C(O)O - M + M is a salt that forms a cation. Preferably, R 10 Selected from linear or branched C 10 -C 22 Alkyl, linear or branched C 10 -C 22 Alkenyl, R 11 C(O)-represented acyl group; R 11 Selected from linear or branched C9-C 22 Alkyl, linear or branched C9-C 22 Alkenyl; M + Selected from sodium, potassium, ammonium and triethanolamine (TEA).

[0053] Amino acid surfactants can be obtained from the alkylation and acylation of α-amino acids, the α-amino acids being selected from alanine, arginine, aspartic acid, glutamic acid, glycine, isoleucine, leucine, lysine, phenylalanine, serine, tyrosine and valine. Representative n-acyl amino acid surfactants include, but are not limited to: mono- and dicarboxylates (e.g., sodium, potassium, ammonium and TEA) of N-acryloyl glutamic acid, for example, sodium cocoyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, sodium palmitoyl glutamate, sodium stearoyl glutamate, disodium cocoyl glutamate, disodium stearoyl glutamate, potassium cocoyl glutamate, potassium lauroyl glutamate and potassium myristoyl glutamate; carboxylates (e.g., sodium, The invention also provides surfactants such as sodium, potassium, ammonium and TEA (for example, sodium cocoyl alaninate and TEA lauroyl alaninate); carboxylates of N-acryloyl glycine (for example, sodium, potassium, ammonium and TEA), for example, sodium cocoyl glycerate and potassium cocoyl glycerate; N-acryloyl carboxylates of sarcosine (for example, sodium, potassium, ammonium and TEA), for example, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium myristoyl sarcosinate, sodium oleoyl sarcosinate and ammonium lauroyl sarcosinate; and mixtures of the foregoing surfactants.

[0054] Betaines and sulfobetaines that can be used in the present invention are selected from: alkyl betaines represented by formula (4), alkyl amino betaines represented by formula (5), alkyl amido betaines represented by formula (6), and the corresponding sulfobetaines (sulfobetaines):

[0055]

[0056] Where R 12 It is C7-C 22 Alkyl or alkenyl, each R 13 are independently C1-C4 alkyl, R 14 is a C1-C5 alkylene group or a hydroxy-substituted C1-C5 alkylene group, n is an integer of 2-6, A is a carboxylic acid group or a sulfonic acid group, and M is a salt that forms a cation. Preferably, R 12 It is C 11 -C 18 Alkyl or C 11 -C 18 Alkenyl; R 13 is methyl; R 14 is selected from methylene, ethylene or hydroxypropylene; n is 3; and M is selected from sodium, potassium, magnesium, ammonium and mono-, di- and triethanolamine cations.

[0057] Examples of suitable betaines include, but are not limited to, lauryl betaine, coco betaine, oleyl betaine, coco hexadecyl dimethyl betaine, lauryl amidopropyl betaine, cocoamidopropyl betaine, and cocoamidopropyl hydroxysultaine.

[0058] Alkyl amphocarboxylates such as alkyl amphoacetates and alkyl amphopropionates (mono- and di-substituted carboxylates) can be represented by formula (7):

[0059]

[0060] Among them, R 15 It is -CH2C(O)O - M + 、-CH2CH2C(O)O - M + or -CH2CH(OH)CH2SO3 - M + , R 16 is hydrogen or -CH2C(O)O - M + , R 17 It is C7-C 22 Alkyl or alkenyl, M is a cation selected from sodium, potassium, magnesium, ammonium and mono-, di- and triethanolamine.

[0061] Exemplary alkyl amphocarboxylates include, but are not limited to, sodium cocoamphoacetate, sodium lauroamphoacetate, sodium caprylamphoacetate, disodium cocoamphoacetate, disodium lauroamphodiacetate, disodium caprylamphodiacetate, disodium caprylamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium caprylamphodipropionate, and disodium caprylamphodipropionate.

[0062] The nonionic surfactant can be any nonionic surfactant known or previously used in the field of aqueous surfactant compositions. Suitable nonionic surfactants include, but are not limited to, aliphatic (C6-C 18 ) primary or secondary straight or branched chain acids, alcohols or phenols; alkyl ethoxylates; alkylphenol alkoxylates (especially ethoxylates and mixed ethoxy / propoxy moieties); block oxyalkylene condensates of alkylphenols; oxyalkylene condensates of alkanols; and ethylene oxide / propylene oxide block copolymers. Other suitable nonionic surfactants include mono- or di-alkyl alkanolamides; alkyl polyglucosides (APGs); sorbitan fatty acid esters; polyoxyethylene sorbitan fatty acid esters; polyoxyethylene sorbitan esters; polyoxyethylene acids, and polyoxyethylene ethanols. Other examples of suitable nonionic surfactants include coco mono- or diethanolamide, coco glucoside, decyl diglucoside, lauryl diglucoside, coco diglucoside, polysorbate 20, polysorbate 40, polysorbate 60, polysorbate 80, glyceryl stearate, PEG-100 stearate, laureth 7, oleth 20, as well as ethoxylated linear alcohols, cetearyl alcohol, lanolin alcohol, stearic acid.

[0063] In a preferred embodiment, nonionic surfactants include, but are not limited to, alkoxylated methyl glucosides, such as methyl gluceth-10, methyl gluceth-20, PPG-10 methyl glucosides, and PPG-20 methyl glucosides; hydrophobically modified alkoxylated methyl glucosides, such as PEG 120 methyl glucose glycol ester, PEG-120 methyl glucose trioleate, and PEG-20 methyl glucose sesquistearyl ester are also suitable. Other exemplary hydrophobically modified alkoxylated methyl glucosides are disclosed in U.S. Pat. Nos. 6,573,375 and 6,727,357, the disclosures of which are hereby incorporated by reference in their entirety.

[0064] Other surfactants that can be used in the present invention are given in detail in WO99 / 21530, U.S. Pat. No. 3,929,678, U.S. Pat. No. 4,565,647, U.S. Pat. No. 5,720,964 and U.S. Pat. No. 5,858,948. In addition, suitable surfactants are also described in McCutcheon's Emulsifiers and Detergents (North American and International Editions, by Schwartz, Perry and Berch), all of which are incorporated by reference.

[0065] Exfoliation

[0066] In the same composition of the present invention, 1 to 45% by weight, preferably 1 to 10% by weight, of particles having an average diameter greater than 50 microns that help remove dry skin can be used. Without being bound by theory, the degree of exfoliation depends on the size and morphology of the particles, with large, coarse particles generally being very rough and irritating, and very small particles likely not acting as effective exfoliants. Such exfoliants used in the art include natural minerals such as silica, talc, calcite, pumice, tricalcium phosphate; seeds, such as rice seeds, apricot seeds, etc.; crushed shells, such as almond shells and walnut shells; oats; polymers such as polyethylene and polypropylene beads, petals and leaves; microcrystalline wax beads; jojoba ester beads, etc. These exfoliants can be of various particle sizes and morphologies, from micrometer size to several millimeters. They also have a range of hardness.

[0067] Hydrophobic skin or hair benefit agents

[0068] In a preferred embodiment, the taurine cleansing composition further comprises a hydrophobic skin or hair benefit agent in an amount of 0 to 30 wt %, preferably 0.1 to 10 wt %, more preferably 0.1 to 5 wt %.

[0069] Hydrophobic skin or hair benefit agents include, but are not limited to:

[0070] (a) silicone oils and modifications thereof, such as linear and cyclic polydimethylsiloxanes; amino silicone oils, alkyl silicone oils, alkylaryl silicone oils and aryl silicone oils;

[0071] (b) oils and fats, including natural oils and fats (triglycerides), such as jojoba oil, soybean oil, sunflower oil, rice bran oil, avocado oil, almond oil, olive oil, sesame oil, almond oil, castor oil, coconut oil, mink oil; cocoa butter; tallow, lard; hardened oils obtained by hydrogenating the above oils; and synthetic mono-, di- and triglycerides such as myristic acid glyceryl and 2-ethylhexanoic acid glyceryl;

[0072] (c) waxes, such as carnauba wax, spermaceti, beeswax, lanolin, and their derivatives;

[0073] (d) hydrophobic plant extracts;

[0074] (e) hydrocarbons, for example petrolatum, polybutene, liquid paraffin, microcrystalline wax, ozokerite, squalene, pristan and mineral oil;

[0075] (f) higher alcohols, such as lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, behenyl alcohol, cholesterol and 2-hexyldecanol;

[0076] (g) Esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glyceryl monostearate, glyceryl distearate, glyceryl tristearate, alkyl lactates, alkyl citrates and alkyl tartarates;

[0077] (h) essential oils and extracts thereof, for example, mint oil, jasmine oil, camphor oil, white fir oil, bitter orange peel oil, ryu, turpentine oil, cinnamon oil, bergamot oil, mandarin oil, calamus oil, pine oil, lavender oil, bay, clove oil, hiba, eucalyptus oil, lemon oil, borage oil, thyme oil, peppermint oil, rose oil, sage oil, sesame oil, ginger oil, basil oil, juniper oil, citronella oil, rosemary oil, mahogany oil, avocado oil, grape oil, grape seed oil, myrrh oil, cucumber oil, watercress oil, calendula oil, elderflower oil, geranium oil, linden flower oil, amaranth oil, algae oil, ginkgo oil, ginseng oil, carrot oil, guarana oil, tea tree oil, jojoba oil, comfrey oil, oat oil, cocoa butter, neroli oil, vanilla oil, green tea oil, pennyroyal oil, royal, aloe oil, menthol oil, eucalyptus oil, eugenol oil, citral oil, citronelle oil, borneol oil, linalool oil, geraniol oil, evening primrose oil, camphor oil, thymol oil, spirantol, penene, limonene oil and terpenoid oils;

[0078] (i) Mixtures of any of the above components, etc.

[0079] Water-soluble skin or hair benefit agents

[0080] In a preferred embodiment, the taurine cleansing composition further comprises a water-soluble skin or hair benefit agent in an amount of 0 to 50 wt %, preferably 3 to 30 wt %.

[0081] Water-soluble skin or hair benefit agents include, but are not limited to, allantoin, urea, pyrrolidone carboxylic acid and its salts, hyaluronic acid and its salts, sorbic acid and its salts, amino acids (eg, lysine, arginine, cystine, guanidine), polyols, sugars.

[0082] In a preferred embodiment, the taurine cleaning composition further comprises an additive selected from at least one of a preservative, a chelating agent, an antimicrobial agent, a filler (such as clay, talc), a penetrant, a sunscreen, a fragrance, a dispersant, and a film-forming agent.

[0083] Although the above mentioned optional components are given as examples, other optional components compatible with cosmetic applications known in the art may be used.

[0084] The following sources of raw materials are provided for illustrative purposes:

[0085] Purchase methods and models of reagents used in the examples

[0086]

[0087]

[0088] Test Case

[0089] Viscosity at 25°C and 50°C: Brookfield DV-II+Pro viscometer, shear rate 0.6s -1 ; When the cleaning composition is stable at 25°C for at least 2 weeks without visually observable separation, the stability at room temperature (25°C) is judged to be OK and is indicated by "O"; when the cleaning composition is stable at 50°C for at least 2 weeks without visually observable separation, the high temperature (50°C) stability is judged to be OK and is indicated by "O"; when the requirement of "stable at 25°C for at least 2 weeks without visually observable separation" is not met, it is indicated by "X".

[0090] illustrate:

[0091] Unless otherwise specified, the following examples are calculated by weight percentage;

[0092] Unless otherwise specified, the total weight percentage of all ingredients in the composition is 100%.

[0093] All examples are water-based compositions, ie, the remainder is made up to 100% with water.

[0094] Effect of surfactants in Examples A1-A8

[0095] The formulas of Examples A1-A8 are shown in Table 1, and the preparation methods are as follows:

[0096] The raw materials were weighed according to the formula, and the surfactant and fatty acid were added into deionized water, heated to 50° C. and stirred to dissolve to obtain the taurine cleaning composition. The viscosity of the taurine cleaning composition of Examples A1-A8 at 25° C. and 50° C. was tested, and the results are shown in Table 1.

[0097] Table 1

[0098]

[0099]

[0100] As can be seen from Table 1, Examples A1-A8 use the specified sodium taurine salt and lauric acid in combination to prepare the taurine cleaning composition at a shear rate of 0.6s -1 The viscosity at 25°C is greater than 1000 mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥ 0.3. It is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good room temperature (25°C) stability and high temperature (50°C) stability.

[0101] Effect of fatty acid type in Examples B1-B8

[0102] The formula of Examples B1-B8 is shown in Table 2-3, and the preparation method is as follows:

[0103] The raw materials were weighed according to the formula, the surfactant and fatty acid were added into deionized water, heated to 50°C and stirred to dissolve, and the pH was adjusted with citric acid to obtain the taurine cleaning composition. The viscosity of the taurine cleaning composition of Examples B1-B8 at 25°C and 50°C was tested, and the results are shown in Table 2.

[0104] Table 2

[0105]

[0106] As can be seen from Table 2, Examples B1-B8 use the defined taurine sodium salt and fatty acid in combination to prepare the taurine cleaning composition at a shear rate of 0.6s -1The viscosity at 25°C is greater than 1000 mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥ 0.3. It is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good room temperature (25°C) stability and high temperature (50°C) stability.

[0107] Effect of Example C1-C6 Polyols

[0108] The formulas of Examples C1-C6 are shown in Table 3, and the preparation methods are as follows:

[0109] The raw materials were weighed according to the formula, and the surfactant, fatty acid and polyol were added into deionized water, heated to 50°C and stirred to dissolve, and the pH was adjusted with citric acid to obtain the taurine cleaning composition. The viscosity of the taurine cleaning composition of Examples C1-C6 at 25°C and 50°C was tested, and the results are shown in Table 3.

[0110] Table 3

[0111] Component (%) C1 C2 C3 C4 C5 C6 Sodium Methyl Myristoyl Taurate 3 3 3 3 3 3 Sodium Lauroyl Taurate 7 7 7 7 7 7 Palmitic acid 3.5 3.5 3.5 3.5 3.5 3.5 Stearic acid 6.5 6.5 6.5 6.5 6.5 6.5 Sorbitol 30 / / / / / glycerin / 30 / / / / sucrose / / 25 / / / Polyethylene glycol 400 / / / 30 / / Mannose / / / / 30 / Anhydrous glucose / / / / / 30 Citric acid to adjust pH 5 5 5 5 5 5 Deionized water margin margin margin margin margin margin Viscosity at 50℃ 195000 79000 148000 34000 220000 275000 Viscosity at 25℃ 123000 29000 77000 74000 639000 62000 50℃ / 25℃ viscosity ratio 1.59 2.72 1.92 0.46 0.344 4.43 Is the viscosity greater than 1000mPa.s at 25℃? yes yes yes yes yes yes Stability at room temperature (25°C) O O O O O O High temperature (50°C) stability O O O O O O

[0112] As can be seen from Table 3, based on the specified combination of taurine sodium salt and fatty acid, polyol is added to prepare the taurine cleaning composition at a shear rate of 0.6s -1 The viscosity at 25°C is greater than 1000 mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥0.3. The composition is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good room temperature (25°C) stability and high temperature (50°C) stability. Among them, the taurine cleaning composition prepared using sorbitol, sucrose, glycerol and anhydrous glucose as polyols has a higher 50°C / 25°C viscosity ratio, which is better than polyethylene glycol 400 and mannose.

[0113] Effect of different pH values ​​on structured viscosity in Examples D1-D7

[0114] The formulas of Examples D1-D7 are shown in Table 4, and the preparation methods are as follows:

[0115] The raw materials were weighed according to the formula, and the surfactant, fatty acid and polyol were added into deionized water, heated to 50°C and stirred to dissolve, and the pH was adjusted with citric acid to obtain the taurine cleaning composition. The viscosity of the taurine cleaning composition of Examples D1-D7 at 25°C and 50°C was tested, and the results are shown in Table 4.

[0116] Table 4

[0117]

[0118] It can be seen from Table 4 that the taurine cleaning composition of the present invention has good viscosity stability under the condition of pH 3-6, and the present invention prepares a taurine cleaning composition that self-thickens under acidic conditions.

[0119] Examples E1-E4, Comparative Examples 1-4 and Comparative Examples 1B-4B

[0120] The formulas of Examples E1-E4, Comparative Examples 1-4 and Comparative Examples 1B-4B are shown in Table 5, and the preparation methods are as follows:

[0121] The raw materials were weighed according to the formula, and the surfactant, fatty acid and polyol were added into deionized water, heated to 50°C and stirred to dissolve, and the pH was adjusted with citric acid to obtain the taurine cleaning composition. The viscosity of the taurine cleaning composition of Examples C1-C6 at 25°C and 50°C was tested, and the results are shown in Table 5.

[0122] Table 5

[0123]

[0124]

[0125] It can be seen from Table 5 that the products of Examples E1-E4 have a shear rate of 0.6s -1 The viscosity at 25°C is greater than 1000mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥0.3. It is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good room temperature (25°C) stability and high temperature (50°C) stability. However, in Comparative Examples 1-4, no fatty acid structurant is added, and the viscosity of the composition is very small. Even if the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥0.3, it is difficult to meet the viscosity requirement, and it is not stable. Comparative Examples 1B-4B do not use a fatty acid structurant but a thickener (PEG-150 stearate), which can meet the requirement of "stability at a shear rate of 0.6s -1 The viscosity at 25℃ is greater than 1000mPa.s", but it cannot meet the requirement of "the ratio of the viscosity at 50℃ to the viscosity at 25℃ is ≥0.3". The viscosity at room temperature (25℃) can meet the requirement and is stable, but the viscosity at high temperature (50℃) drops sharply, making the product unstable.

[0126] Application Examples F1-F4

[0127] The formulas of Examples F1-F4 are shown in Table 6, and the preparation methods are as follows:

[0128] The raw materials were weighed according to the formula, the surfactant, fatty acid and polyol were added to deionized water, heated to 50°C and stirred to dissolve, the remaining components were added, stirred until uniform, and the pH was adjusted with citric acid to obtain the taurine cleaning composition. The viscosity of the products of Examples F1-F4 at 25°C and 50°C was tested, and the results are shown in Table 6.

[0129] Table 6

[0130]

[0131] In the body moisturizing scrub corresponding to Example F2, due to the addition of a high-density hydrated silica scrub, if it cannot have a high viscosity within a normal temperature range, precipitation problems often occur. In the selenium disulfide anti-dandruff and antipruritic scalp cleansing cream corresponding to Example F3, due to the addition of high-density and difficult to suspend and stabilize selenium disulfide, it is often necessary to add some thickeners or perform special processing to achieve system stability. In the body / scalp cleansing cream corresponding to Example F4, due to the addition of a large amount of relatively high-density sodium chloride, precipitation is easy, and a large amount of sodium chloride will cause salting out of the surfactant, thereby destroying the stability of the system.

[0132] However, it can be seen from Table 6 that the products of Application Examples F1-F4, even Application Examples F2-F4 with a high density of exfoliants or anti-dandruff agents, have a high shear rate of 0.6 s -1 The viscosity at 25°C is greater than 1000mPa.s, and the ratio of the viscosity at 50°C to the viscosity at 25°C is ≥0.3. It is stable at 25°C and 50°C for at least 2 weeks without visually observable separation, and has good room temperature (25°C) stability and high temperature (50°C) stability. A very stable system can be obtained without special treatment, which shows that the present invention uses alkanoyl taurine and / or methyl alkanoyl taurine in combination with a certain proportion of fatty acids and adds polyols, which can not only achieve the viscosity stability requirements of ordinary cleaning products without adding solid components with higher density, but also meet the stability requirements of cleaning products with a large amount of solid components with higher density.

[0133] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A taurine cleaning composition that self-thickens under acidic conditions, characterized in that: It is composed of the following raw materials: A) a taurate surfactant; the taurate surfactant is selected from alkanoyl taurate and / or methyl alkanoyl taurate; The alkanoyl taurate is at least one of sodium lauroyl taurate, sodium myristoyl taurate, and sodium cocoyl taurate; the methyl alkanoyl taurate is at least one of sodium methyl lauroyl taurate, sodium methyl myristoyl taurate, and sodium methyl cocoyl taurate; B) fatty acid; the fatty acid is a saturated or unsaturated fatty acid of C8-C20; C) a polyol; the polyol is selected from at least one of propylene glycol, polyethylene glycol, sorbitol, glucose, sucrose, and trehalose; D) Acid-base regulator; E) Water; The total amount of the taurate surfactant is 1-15% by weight; the amount of the fatty acid is 0.5-20% by weight; the amount of the polyol is 1-40% by weight; the amount of the acid-base regulator is 0.01-5% by weight; The taurine cleaning composition has a viscosity of ≥1000 mPa.s at 25°C at 0.6 s-1, and a ratio of the viscosity at 50°C to the viscosity at 25°C of ≥0.

3.

2. The taurine cleaning composition according to claim 1, characterized in that The acid-base regulator includes at least one of citric acid, lactic acid, salicylic acid, glycolic acid, fruit acid, hydrochloric acid, and phosphoric acid; the pH of the taurine cleaning composition is 2.5-5.

9.

3. The taurine cleaning composition according to claim 2, characterized in that The polyol is sorbitol or glucose; the acid-base regulator is citric acid or salicylic acid; and the pH value of the taurine cleaning composition is 3.5-5.

5.

4. The taurine cleaning composition according to claim 1, characterized in that The total amount of the taurate surfactant is 3-15% by weight; the amount of the fatty acid is 0.5-15% by weight; and the amount of the polyol is 3-30% by weight.

5. The taurine cleaning composition according to claim 1, characterized in that The fatty acid includes at least one of oleic acid, coconut acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid.

6. The taurine cleaning composition according to claim 1, characterized in that The taurine cleaning composition further comprises a surfactant B other than the taurate surfactant A, wherein the amount of the surfactant B is 0-15% by weight; the surfactant B is selected from one or more of anionic surfactants, cationic surfactants, nonionic surfactants and amphoteric surfactants.

7. Use of the taurine cleaning composition that self-thickens under acidic conditions as claimed in any one of claims 1 to 6 in the preparation of personal care detergents.

8. The use according to claim 7, characterized in that The personal care detergent further comprises an exfoliant and / or an anti-dandruff agent, wherein the amount of the exfoliant is 1 to 45% by weight, and the amount of the anti-dandruff agent is 0.1-5% by weight.

9. The use according to claim 7, characterized in that The personal care detergent also includes a hydrophobic skin or hair benefit agent; the hydrophobic skin or hair benefit agent includes at least one of silicone oil, grease, wax, hydrophobic plant extract, hydrocarbon, higher alcohol, and ester.

10. The use according to claim 7, characterized in that The personal care detergent also includes a water-soluble skin or hair benefit agent; the water-soluble skin or hair benefit agent includes at least one of allantoin, urea, pyrrolidone carboxylic acid, pyrrolidone carboxylic acid salt, hyaluronic acid, hyaluronic acid salt, sorbic acid, sorbate, and amino acid.

11. The use according to claim 7, characterized in that: The personal care detergent also includes additives, and the additives are selected from one or more of preservatives, chelating agents, fillers, penetrants, sunscreens, fragrances, dispersants, and film-forming agents.

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